/*
 * Syntelos 'SX'
 * Copyright (C) 1998, 2007  John Pritchard.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */
package syntelos.sx.methods;

import alto.sys.Reference;

/**
 * @author jdp
 * @since 1.6
 */
public class Get
    extends syntelos.sx.Response
{

    public Get(){
        super();
    }


    public void respond(syntelos.sx.Request req)
        throws java.io.IOException,
               java.lang.InterruptedException
    {
        if (req.isFile()){
            Reference reference = req.getReference();
            /*
             * Conditional GET
             */
            String etag = req.getIfNoneMatch();
            if (null != etag && etag.equals(req.getETag()))
                this.setStatusNotModified(reference);
            else {
                long modif = reference.getStorageLastModified();
                long since = req.getIfModifiedSince();
                if (0L < since && modif <= since)
                    this.setStatusNotModified(reference);
                else {
                    if (!reference.get(this))
                        this.setStatusNotFound();
                }
            }
        }
        else if (req.canRedirectWelcome()){
            req.redirectWelcome(this);
        }
        else if (this.canRedirectDir()){
            req.redirectDir(this);
        }
        else {
            this.setStatusNotFound();
        }
    }
}
